Combination sawing machine



June 2, 1931. f A. E. DE KONING '1,808,453

' COMBINATION SAWING MACHINE Fileduune 1o, 1929 l /5'2 v @QQ f5@ Inventorf LUNITEDSTATES Patented June 2,1931

PATENT oFFicEfi ARTHUR E. Dr, KONING, or; roRrLANnv AonI'ieoN' COMBINATION sev/*ING MACHINE Application `led J' une 107 My invention relates to improvements in combination sawing machines in which the saw moves ythrough the work in the cuttingoif operation, and inrwhich the work is fed 5 -t-o the saw in the ripping operation, wherein cial ,utility of a mitre saw in which a vertically l adjustable saw is j ournaled above and moves through the work, and of a vertically adjustable rip saw journaled abovethe work.

O ther objects and advantages of my invention are apparent Iin the following discourse wherein the signicance of thereference numerals in the accompanying drawings, details of cnnstruction and operation of a typical device embodying the invention, .andits` particular advantages and utility are explained.

complete machine .partly in vertical section.

Figure 2 represents side view of a fragv nient of the .machine in elevation. Figure 3 represents atop view of a member eo shown in its other two aspects than in Figuresl and 2. Y Figurejll represents a top view. of the table of the machine with lboth cutting-Ofi' and ripping gages secured. Figure 5 represents aside view in elevation 'ofthe iframe of the machine.

The reference numeral 1 indicates the'base of vthey machine vto 'which the column 2 is attached. At the extremity of this column 2 4G Vat yaepoint 3 a vertical Shaft 4 is journaled.Vv

The upper end of this vertical shaft 1- is provided with-fa4 thread engaging a female counterpart in the hand wheel 6 at 7. To the lower end of the shaftf a horizontal shaft 8 45 is rigidly securedby the piece 9.

extremity ofthe vsaw carriage l0, the saw arboris journaled in the usual manner of 5,0 swingA saws. A motor 12, secured to a slid- .-respectively, and a handle Figure 1 represents a front view of the 1929. Serial No. 869,737.

ing frame 1.3, adjustable vertically to .tighten the belt 14: by means of a screw 13 rotatably mounted in'a projection 42 formed on the carriage 10 and engagingthe sliding f1-aine43; the said slidingframe being iny tui-n fitted to the slideways and; L11 also foi-'medion the carriage 110. A belt 14 serves to drive the arbor 11 from the motor 12. The customary saw andY belt guardsfljand 16 17 are secured to the saw carriage 10.

The piece 9 is formed with several.' special parts as follows: Two wings 18 and19 into which the adjustable ,contact points 20 and 21 respectively arescrewed, serve to vlimit the 565 rotation of thepiece aboutits verticalaxis providedby the shaft 4, so that the saw carriage and hence thesaw blade may be conveniently moved through ninety degrees for cutting oif or ripping; a stop. 22 rigidly secured inf the column2 engaging the said contact points 20. and 21,.

j A .clamping screw 23 engaging 'a thread in the column 2 affordsiameans forsecuring the shaft land depending members against rotavv 75 tionabout thegv'ertcal axis, and the hand wheel 6 affords aimeans Vfor raising and lowering the shaft i with its depending members.

l In the lateral aspect of the machine as represented inFig-ure 2, and aifecting the-mofv bility of the carriage 10 about its horizontal pivotal'axis provided by the shaft 8, several other parts cooperate as follows: A circular piece 25 attached to the back of the carriage 10 passes through a clamping piece 26 formed upon the piece 9 and provided with a clamping screw 2,7. The piece 26 is further formed with a chamber 28in which is set a rubber ibuffer 29 to engage the carriage 10 at the limit Ofits backward stroke when the'mac-hine is used for cutting'oiilv i .Y

The saw carriage 10 is thus mounted upon -a rmiversal joint comprising two perpendicnlarly disposed axes, and means.` are provided l to' 'restrict the motion of the carriage Vvabout -95 This horizontalshaft 8 supports the saw carriage 10 journaled thereon. At the lower either or both-of these axes, as well, the universal joint itself .being capable of a vertical adjustment. These features are of especial utility in connection with a, table 30 secured to the base of ,the machine 1 to which all"100 of the above adjustments and motions are related.

A cut made in the table 30 by the Vsaw 31 is represented at 32 in Figure 4.' A dovetailed slot 33 and customary clamping device 34 afford a means for securing the rippinggage 35 in a selected position upon the table, or for removing it entirely therefrom. A straight-edge guide composed ofl the two pieces 36 and 37 for use in cutting olf is lilie-r wise removable; in Figure l this guide is shown as secured in place .for cutting off work, whilst the ripping gage 35 is removed.

The following description of the voperation of the machine comprises only that peculiar Vto this machine as distinguished fiom ordinary machines since the manner of driving the saw blade is .well understood.

'For cutting ofi work the machine is set up as illustrated 4in Figure l, namely, the screw '23 is made to clamp the shaft 4in a particular position determined by the handwheel (Sand contact screw 21 engaging the stop 22 ;the screw 27 (Figure 2) being disengaged from the circular piece 25. Stock is placed against the guide 36-37Y and the cut i made iii the manner comiiion-to'swinging cutoff saws.

For mitering, the screw 23 is loosened and the horizontal axis of oscillation of the saw A carriage k10 provided `bythe shaft. 8 is rotated `upon the vertical axis provided bythe shaft 4 to the desired angle where the shaft lflis again secured against rotation by setting up the screw 23.`r

A particular characteristic of my invention is the-provision for the alignment in the same plane with the vertical axis provided for by the shaft 4 of the saw blade to provide for the location of the path of the saw in its oscil- VVlatorymotion where it .emerges from the.-

straight-edge 36-37 at the same position regardless of the angular'adjustment ofthe saw carriage about that axis;v This conteniplates the alignment of the V`straight-edge 36-37 also with particular reference to the vertical aXis. Thus, two planes whose line of intersection coincides with this vertical Y axiscoiitain respectively, the saw, blade on Vthe one liaiid and the straight-edge 364-37 on theother hand; Y

For ripping with the saw rigid, the carriage is rotated-upon'its vertical axis and secured in the manner above described, in -a position'whereat the saw will be parallel toy the ripping gage 35 which is now substituted .zupon the table for the cut-off guide 36-37. -NeXt, the carriage is pushed -back slightly toward the buffer29 so that the leading edge Lof the saw Vshall be just behind the vertical axis of rotation of the carriage, and the clamping screw 27 set up toflock the carriage upon its horizontal axis. l

The screw 23 is -now again loosened and the hand-wheel 6 manipulated to procure the desired position of the saw with reference to,

niitering, or ripping with the grain.

The centery of gravity of the carriage and niotorassenibly is disposed forward of a f line -joining the `arbor with` the lhorizontal shaft so V as to provide for the .returnof the saw to its rear-most position when used in cutting olf work, or tov hold the leading edge of the saw approximately in line with the vertical axis (providedby the shaft 4) when the machine is being made ready for ripping.

i It being a matter of very great importance to` insure the parallelism of the saw blade with theripp-ing gage to keep the sawfrom leading in a ripping cut, Yspecial provision is made in my invention to correct slight misalignments of the sawlblade caused by the straining of the supporting members of the arbor, or by improper feeding of the stock to the saw, accruing out of vthe disposition of the'parts'resistingsuch strains as related i to the force causing such misalignment.-

It willbe evident tliat'although afair'pro- -visionfor the alignment of the saw is afforded by the normal rigidity of the parts i suffering such stresses, the elasticity of the materials'employed vwill allow of some troublesonievariations of lthe saw bladefrom eigact truth of alignment; each member? being distorted in a'degree affected by the lengths of the leversinvolved and the dimensions of parts so stressed. In consequence of this, the shaftrbeing the Amember of slightest dimension, and subjected to relatively great leverages, will contain the center of such distortions whilst the sawblade will have the toition. Hence, ina manner analagous to the `actionr of a trailingcaston'the saw blade will tend always to swing back to truth of alignment,-constituting a function of even greater-:value than thatfpossible-to incorporate by extreme rigidity. llavingf described my invention what I claim is:

" l.' A combination sawing inachinecompris# ing, a-standardsecuredto a base fitted with al table, a saw carriage' attached to said standard by a universaljoint comprisingtwo perfpendicularly disposed axes, one of' which is vvertical and supports the 'other with its'd'epending 'members, and lmeans for securing saidA carriage against oscillation about either vor both ofsaid axeslwherein the said'Vertical .greatest amplitude of movement in the disaxis of said universal joint is disposed in the plane containing the saw blade, and is adj ustable vertically through its journal in said standard.

2. A combination sawing machine comprising a standard secured to a base fitted with a table, a saw carriage attached to said sta-ndard by a universal joint comprising two perpendicularly disposed axes a vertical one of which supporting the other with its depending saw carriage is vertically adjustable through said standard, and means for securing said carriage against oscillation about either or both of said axes comprising a single means for securing the said vertical axis against rotation or axial movement through its journal in said standard wherein the said vertical axis of said universal joint is disposed in the plane containing the saw blade.

3. A combination sawing machine comprising, a standard secured to a base fitted witha table, a saw carriage attached to said standard by a universal joint comprising twoperpendicularly disposed shafts and cooperating journals, one of which shafts, vertically disposed in the plane of the saw blade and carrying the other shaft and depending saw carriage, is adjustable axially through its journal formed in said standard by means of a hand wheel engaging a thread thereon and bearing upon said standard, and means for securing said carriage against oscillation about either or both axes of said universal joint.

4. A combination sawing machine compris- Y ing, a standard secured to a base fitted with a table, a saw carriage attached to said standard by a universal joint comprising two perpendicularly disposed shafts and cooperating journals one o-f which shafts is vertical and adjustable axially through its journal formed in said standard by means of a hand-wheel engaging a thread thereon and bearing upon said standard, a pair of contacts rigidly attached to said vertical shaft adapted to engage a stop secured to said standard to limit theY rotation of said saw carriage about its vertical axis to approximately ninety degrees wherein the vertical axis of said universal joint is disposed in the same plane as the saw blade.

5. A combination sawing machine comprising, a standard secured to a base fitted with a table, a saw carriage depending from said standard upon a universal joint comprising two perpendicularly disposed axes, the vertical one of which is axially adjustable through said standard, means for raising and lowering said universal joint and saw carriage, and a straight-edge adapted to be attached to said table wherein the line of intersection of two planes containing respectively the said straight-edge and saw blade coincides with the vertical one of the said two axes.

6. A combination sawing machine comprising, a standard secured to, a base fitted with a table, a saw carriage depending from said standard upon a universal joint comprising two perpendicularly disposed shafts and cooperating journals one of which said shafts is vertical and adjustable axially through its journal formed in said standard by means of a hand wheel engaging a thread thereon and bearing upon said standard, a pair of contacts rigidly attached to said vertical shaft adapted to engage a stop secured to said standard to limit the rotation of said saw carriage about its vertical axis to approximately ninety degrees, a straight-edge attachable to said table through which the saw moves in cut-off work, a ripping gage attachable to said table parallel with but separated from the position of said straightedge, and wherein the said vertical shaft contains the line of intersection of two planes in which lie the said straight-edge and the saw blade respectively.

7. A combination sawing machine comprising, a standard secured toa base fitted with a table, a saw carriage depending from said standard upon a universal joint comprising two perpendicularly disposed shafts and cooperating journals one of which said shafts is vertical and adjustable axially through its journal formed in said standard by means of a hand wheel engaging a thread thereon and bearing upon said standard, a driving moto-rv mounted upon the forwardmost face of said saw carriage to cause the 100 said saw carriage when at rest to be disposed by force of gravity at its rearmost position, means for adjusting said motor upon said saw carriage to tighten the driving belt, a pair of contacts rigidly attachedto said ver- 105 tical shaft adapted to engage a stop secured to said standard to limit the rotation of said saw carriage aboutits vertical axis to approximately ninety degrees, a straight-edge attachable to said table through which the 110 saw moves in cut-off work, a ripping gage attacha-ble to said tab-le parallel with but separated from the position Yof said straightedge, and wherein the said vertical `shaft contains the line of intersection of two planes v saw blade respectivel 

